Pher c



(No Model.)

H. J. BIERHART.

POWER HAMMER.

No. 385,540. Patented July 3,1888.

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Nv PETERS PhamLilhognphar. Wnhingtnn. D- C.

thnrnn STATES PATENT Gretna HERMAN J. BIERHART, OF SYRACUSE, NElV YORK, ASSIGNOR TO CHRISTO- PHER G. BRADLEY, OF SAME PLACE.

POWER HAMMER.

SPECIFICATION forming part of Letters Patent No. 385,540, dated July 3, 1888.

Application filed January 19, 1887. Serial No. 224,747. (No model.)

To aZZ whom it may concern.-

Be it known that I, HERMAN J. EIERI-IART, of the city of Syracuse, in the county of Onondaga and State of New York, have invented 5 a. new and useful lmprovementin Power-Hammers, of which the following is a specification.

This invention relates to the anvil-blocks of power-hammers, and has the object to attach the anvil-bloolc to the hammerframe in such manner that the block can be turned or adjusted in a horizontal plane for adjusting the die in the anvil to that of the hammer-head, and can be rigidly secured in place when adjusted. l'leretofore anvil -blocks have been I rigidly secured to the hammer-frame without being capable of adjustment therein, which construction is objectionable, because it renders it very difficult to correct the position of the dies when they are out of line. Anvilblocks have also been attached to the frame,

so that they could be turned therein, but Without providing means for securely holding the anvil-block under the jarring produced by the blows of the hammer.

2 My invention has the object to overcome this difficulty; and it consists of the improvements which will be hereinafter fully set forth, and pointed out in the claims.

In the accompanying drawings, Figure l is 0 a perspective view of a power-hammer provided with myimprovement. Fig. 2 is a 1011- gitudinal vertical section of the anvil-block and adjacent portion of the frame. Fig. 3 is a horizontal section in line at a, Fig. 2.

3 5 Likeletters of reference refer to like parts in the several figures.

A represents the frame of a power-hammer; a, the hammer-head; Z), the die of the hammerhead; G, the anvitblock, and c the die of the 0 anvil-block.

(2 represents a curved socket formed in the lower front portion of the hammer-frame and having the form of a hollow-cylinder segment.

6 represents the round back of the anvil- 5 block 0, fitted in the round socketd, so as to be capable of turning therein.

f represents the flat upright front side of the anvil-block, and g is an angular bearingpiece placed against the fiat front side of the anvil-block. 5c

H H represent tie-rods by which the anvilblock is secured to the hammer-frame, and which pass with their rear ends through lugs 7th, formed on both sides of the hammer-frame in rear of the anvil-block. The tierods H straddle the anvil-block, and are provided with bent angular front portions, t, which rest against the angular bearingpiece g. The latter prevents the tie-rods from changing their position on the anvil-block. The rods are 63 tightened by screw-nuts k bearing against the rear sides of the lugs h. Upon loosening the nuts on one side of the hammer-frame and tightening those on the other side the anvilblock is turned in the cylindrical socket of 65 the frame, thereby adjusting the lower die, 0, horizontally. By this means the lower die can be adjusted so as to be parallel with the upper die. Upon tightening the screw-nuts 70, after the anvil-block has been adjusted, the anvil-block is firmly secured to the hammer-frame and prevented, by the angular bearing'piece g and the angular front portions, 2, of the tie-rods, from changing its position in the socket of the frame under the blows of the hammer.

The bearing-piece g is made of wood or similar yielding material, while the anvil-block is made of iron, as usual. The bearing-piece permits the tie-rods H to be drawn perfectly tight and cushions the rods to a certain extent, thereby easing the strain upon the rods and preventing them from working loose. The lower portion of the anvil-block is made cylindrioal, as indicated at j, so that the anvilblock can turn if it should embed itself into the wooden foundation.

I claim as my invention 1. The combination, with the hammer-frame provided with a cylindrical socket, d, of an 0 anvil-block having a round back, 0, fitted in said socket and having an angular front, and tie-rods H, )rovided with angular front portions, 5, fitted against the front of the anvil block and secured adjustably with their rear and tie-rods H, provided with angular front ends to the hammer-frame, substantially asset portions, i, substantially as set forth. 1o forth. Witness my hand this 15th day of January,

2. The combination, with the hammer-frame 1887. 5 provided with a cylindrical socket, d, of an HERMAN J. BTERIIART.

anvil-block provided with a round back fitted XVit-ncsscs: in said socket, an angular bearing-piece, 9, JOHN J. LYNCH, fitted against the front side of the anvitbiook, JAMES CAHILL. 

